Regulating device for throughflow tubular steam generators



V. JUZI May 28, 1940.

REGULATING DEVICE FOR THROUGH-FLOW TUBULAR STEAM GENERATORS Filed April 23, 1938 vaporization "contains some water and is caused to move to a such a control which is the separator, i. e., at the burner or source of heat 6. The operating agent Patented May 28, 1940 REGULATING DEVICE Aron 'THROUGIL" FLOW TUBULAR STEAM Viktor Juzi,

Switzerland,

Anonyme, Winterthur,

Application April 23,

In switzerlandoctober 2 7 Claims;

This invention particularly to a continuous flow generator. special applications is thatin which an operating agent is controlled in its passage through the zone of a boiler at a timetwhen it relates to a steam generator and.

separator from which a portion of the unvaporized water is dischargedpreferably continuously, While the steam which still contains Water is carall) ried to a final evaporator and then to a superheater. A generator of this scribed in my co-pending application 186,504, filed October 11, 1937.

The main object of the invention is to provide eifective to adjust or control the partial quantity of liquid removed from the separator and in plished in accordance to temperature variation in the steam line after the steam has passed from beginning of the superheater. 7

Another object of the invention is to provide a regulatingdevice for controlling the flow of the operating a'gentin the generator of the type in-s 525 dicated.

' Another object is'to' provide such a regulator which operates thermostatically and in which the thermostat is controlled in response toconditions --of the steam after leaving the superheater or "reqao vaporizer. I

' Other objects will appear fromtime to time in the course of the specificationand claims.

The invention is illustrated more or less diaelgrammatically in the accompanying figure, in which I is a feed pump from agent passes/through a conduit 2 to a preheating portion 3 of the steam generator.

From the preheating portion 3 the operating agent flows through a conduit 4 to a vaporizing 1 portion 5 which, is arranged to be heated by a passes from the heating portion 5 through a discharge into a separator 8 into which it is discharged as a mixture of vaporized and unvaporized material.

For the purposes of further description, steam and water will be referred to, but it is to be understood that other operating agentsmight be used and this language is not to be taken as limiting the device .or its operation to use in connection with water alone as the operating agent.

From the separator 8 the steam flows with a partial water content through a conduit 9 to a final vaporizing portion H! from which it passes, 55 as slightly superheated steam, through a conduit general type is dewhich this control is accomwhich the operating GENERATORS,

Ermatingen on the Boden sce, assignor to Sulzer Freres; Societe Switzerland 193s, SerialNo. 203,746

(o1. 122-'-sv9) I p I i l which is associated at any desirable point with a thermostatl1 .beyondwhich it passes into a superheater portion It. From movesthrough a conduit [4 to an engine l5 which may be a ste'am"-engine of i any desired design, and the invention is not'limited to anassociation Es P ENT; I

the superheater it of any particular form of steam engines-The steam passes from the engine. l5 through a conduit l6 to acondenser I1 and finallythrough a to the reed pump l. The thermostat l2, which maybe of any desired form and arrangement, acts through a conduit I9 to actuateeor control a servomotorZU, to actuate or control-adischarge means contained within the housing 2i which controls a discharge outlet orconduit 22 by means of which liquid, such as water or; agent, maybe discharged from the separator-8. The several preheating, vaporizing and superheating zones or apparatuses arepreferably cont ained in a single housing indicated diagrammatically as sit-23 and'heated by the heating; source 6. Obviously, they mightotherwise be arranged and the invention is not limited in' this respect to theparticula'r arrangement shown. Also, the

' conduit 4 might be arranged within the housing '23 or rnight be outside of it as shown.

The use and operation of the invention are as follows:

in the deviceof the present invention the operating agent is circulated by the feed pump I. The regulation member in the housing 21, which 'willordinarily be a discharge valve is moved and controlled in response to the'thermostat and the regulation of the valve or other control is thus made in response to temperature conditions beyond the separator at the beginning of the superheating portion; Thus the quantity of the liquid, which is discharged from theseparator, is at all times held within proper limits and incorrect ratio to the quantity of liquid which passes with the steam into the final vaporization portion ill. I The quantity of liquid'in the separator is at all times controlled in response to the conditions affecting the thermostat. This continuous conother unvaporized. operating trol or regulation is not possible with the use of i moreover the separator 8 cannot become flooded l with excess of water. Thus, the quantity of water permitted to-escape through the regulating valve 2| can be at all times approximately the minimum necessary for satisfactory functioning of the generator whereby the quantity of water which has to be added to the system to replace that drained ofi" is reduced.

Iclaim:

1. In a tubular steam generator system a preheater, an evaporator, a final evaporator and a super-heater, all being in fluid circuit with each other, means for heating them, a separator posi-, tioned between said evaporator and said final evaporator, and means for discharging a part of the liquid from said separator, a thermostatic control for said discharging means, to control the quantity of liquid to be discharged, said thermostatic means positioned in the fluid circuit after the final evaporator and at the beginning of the super-heater.

2. In a once through steam generator system a pre-h'eater, an evaporator, a final evaporator and a super-heater, all being in fluid circuit with each other, enclosing means defining a heated zone and surrounding said members, means for heating said members, a separator positioned between said evaporator and said final evaporator and exterior of said heated zone, and means for discharging liquid from said separator, a thermo static means positioned in the fluid circuit after the final evaporator and at the beginning of the super-heater, and connected to and adapted to contact said liquid discharge means.

3. In a steam power apparatus, the combination of a steam generator including an initial vaporization means, a final vaporization means and a super-heater, a separator, all being in fluid circuit, means for conveying vaporized and unvaporized operating agent from said vaporizing means to said separator and means for conveying vaporized and unvaporized agent from said separator to said final evaporator and means for discharging a part of said unvaporized agent from said separator and a thermostatic control for said discharging means positioned after the final evaporator and at the beginning of said super-heater and adapted to act in response to temperature conditions in the fluid circuit.

4. The method of regulating the operating agent in a once through tubular steam generator which includes the following steps: heating the operating agent in the steam generator and constantly discharging a part of liquid from a point in the system where the operating agent still contains liquid, passing the evaporated operating agent with some unevaporated agent into a zone of further heating, thereafter maintaining the agent constantly at a temperature to insure vaporization of the unvaporized portions thereof, and finally super-heating it, and regulating the said discharge of unevaporized operating agent in accordance with the heat conditions of the operating agent in the region of substantially complete vaporization and before the beginning of said super-heating.

5. The process of heating the operating agent operating in a closed circuit of a steam power installation which includes the following steps: heating the operating agent in a once through tubular steam generator to a point where a part is vaporized and another part remains unvaporized, conducting the vaporized and unvaporized operating agent to a separating zone of the generator, constantly withdrawing fromthat zone a portion of the unvaporized agent, conducting the vaporized agent together with another portion of the unvaporized agent to the boiler for further heating, thereafter maintaining the agent constantly at a temperature to insure vaporization of the unvaporized portions thereof, and finally superheating the agent and causing it to pass thence through the total installation, governing the rate of withdrawal of said unvaporized portion of agent in accordance with heat conditions of the agent after substantially complete evaporation and before super-heating.

6. The process of treating the operating agent operating in a closed circuit steam power installation which includes the following steps: heating the operating agent in a steam boiler to a point where some is vaporized and some remains unvaporized, conducting the vaporized and unvaporized operating agent, together to a separating zone, withdrawing from that zone continuously a portion agent to the boiler, vaporizing said other portion and finally super-heating the vaporized agent and causing it to pass thence through the total installation, and governing the withdrawal of unvaporized operating agent from said sepaoperating in a closed circuit steam power installation whichincludes the following steps: heating the operating agent in a once through steam boiler to a point where some is vaporized and some VIKTOR JUZI. 

